From fd564ee3377d9fc2484c657e4f464a3fb9764d31 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Mon, 29 Jun 2020 13:47:09 +0200
Subject: [PATCH] jpc_enc: validate raw_size, prevent division by zero in
 cp_create()

Closes https://github.com/mdadams/jasper/issues/194 (part 1)
---
 src/libjasper/jpc/jpc_enc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libjasper/jpc/jpc_enc.c b/src/libjasper/jpc/jpc_enc.c
index d60a4471..3b6b1e81 100644
--- a/src/libjasper/jpc/jpc_enc.c
+++ b/src/libjasper/jpc/jpc_enc.c
@@ -428,6 +428,10 @@ static jpc_enc_cp_t *cp_create(const char *optstr, jas_image_t *image)
 	}
 
 	cp->rawsize = jas_image_rawsize(image);
+	if (cp->rawsize == 0) {
+		/* prevent division by zero in cp_create() */
+		goto error;
+	}
 	cp->totalsize = UINT_FAST32_MAX;
 
 	tcp = &cp->tcp;